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Some Current Theoretical Issues around Ultra-High Energy Cosmic Rays

Abstract : We address some current theoretical issues around ultra-high energy cosmic rays. We recall that scenarios producing more gamma-rays than cosmic rays up to high redshift can in general only provide a sub-dominant contribution to the ultra-high energy cosmic ray flux. This includes extra-galactic top-down and the Z-burst scenarios. Finally we discuss the influence of large scale cosmic magnetic fields on ultra-high energy cosmic ray propagation which is currently hard to quantify. The views presented here represent the authors perspective.
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http://hal.in2p3.fr/in2p3-00086587
Contributor : Dominique Girod <>
Submitted on : Wednesday, July 19, 2006 - 11:08:04 AM
Last modification on : Thursday, September 17, 2020 - 12:29:09 PM

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G. Sigl. Some Current Theoretical Issues around Ultra-High Energy Cosmic Rays. 2004 Cracow Epiphany Conference on Astroparticle Physics, Jan 2004, Cracow, Poland. pp.1845-1862. ⟨in2p3-00086587⟩

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